1021121402152 has 8 divisors (see below), whose sum is σ = 1914602629050. Its totient is φ = 510560701072.

The previous prime is 1021121402117. The next prime is 1021121402153. The reversal of 1021121402152 is 2512041211201.

It can be written as a sum of positive squares in only one way, i.e., 604546680676 + 416574721476 = 777526^2 + 645426^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×1021121402152² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1021121402153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 63820087627 + ... + 63820087642.

Almost surely, 2^{1021121402152} is an apocalyptic number.

It is an amenable number.

1021121402152 is a deficient number, since it is larger than the sum of its proper divisors (893481226898).

1021121402152 is a wasteful number, since it uses less digits than its factorization.

1021121402152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127640175275 (or 127640175271 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 22.

Adding to 1021121402152 its reverse (2512041211201), we get a palindrome (3533162613353).

The spelling of 1021121402152 in words is "one trillion, twenty-one billion, one hundred twenty-one million, four hundred two thousand, one hundred fifty-two".