1200102101021 has 4 divisors (see below), whose sum is σ = 1204883384544. Its totient is φ = 1195320817500.

The previous prime is 1200102100999. The next prime is 1200102101137. The reversal of 1200102101021 is 1201012010021.

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 1200102101021 - 2¹⁴ = 1200102084637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1200102100993 and 1200102101011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1200102101621) 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, 2390641385 + ... + 2390641886.

It is an arithmetic number, because the mean of its divisors is an integer number (301220846136).

Almost surely, 2^{1200102101021} is an apocalyptic number.

It is an amenable number.

1200102101021 is a deficient number, since it is larger than the sum of its proper divisors (4781283523).

1200102101021 is an equidigital number, since it uses as much as digits as its factorization.

1200102101021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4781283522.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1200102101021 its reverse (1201012010021), we get a palindrome (2401114111042).

The spelling of 1200102101021 in words is "one trillion, two hundred billion, one hundred two million, one hundred one thousand, twenty-one".