1202021031021 has 4 divisors (see below), whose sum is σ = 1602694708032. Its totient is φ = 801347354012.

The previous prime is 1202021031019. The next prime is 1202021031023. The reversal of 1202021031021 is 1201301202021.

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 an interprime number because it is at equal distance from previous prime (1202021031019) and next prime (1202021031023).

It is a cyclic number.

It is not a de Polignac number, because 1202021031021 - 2¹ = 1202021031019 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1202021031023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 200336838501 + ... + 200336838506.

It is an arithmetic number, because the mean of its divisors is an integer number (400673677008).

Almost surely, 2^{1202021031021} is an apocalyptic number.

It is an amenable number.

1202021031021 is a deficient number, since it is larger than the sum of its proper divisors (400673677011).

1202021031021 is an equidigital number, since it uses as much as digits as its factorization.

1202021031021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400673677010.

The product of its (nonzero) digits is 48, while the sum is 15.

Adding to 1202021031021 its reverse (1201301202021), we get a palindrome (2403322233042).

The spelling of 1202021031021 in words is "one trillion, two hundred two billion, twenty-one million, thirty-one thousand, twenty-one".