1202101021 has 4 divisors (see below), whose sum is σ = 1311382944. Its totient is φ = 1092819100.

The previous prime is 1202101007. The next prime is 1202101037. The reversal of 1202101021 is 1201012021.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1202101021 - 2⁵ = 1202100989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1202100989 and 1202101007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1202101921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54640945 + ... + 54640966.

It is an arithmetic number, because the mean of its divisors is an integer number (327845736).

Almost surely, 2^1202101021 is an apocalyptic number.

1202101021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1202101021 is a deficient number, since it is larger than the sum of its proper divisors (109281923).

1202101021 is a wasteful number, since it uses less digits than its factorization.

1202101021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109281922.

The product of its (nonzero) digits is 8, while the sum is 10.

The square root of 1202101021 is about 34671.3285150714. The cubic root of 1202101021 is about 1063.2783931306.

Adding to 1202101021 its reverse (1201012021), we get a palindrome (2403113042).

The spelling of 1202101021 in words is "one billion, two hundred two million, one hundred one thousand, twenty-one".