1021251141252 has 36 divisors (see below), whose sum is σ = 2651266104396. Its totient is φ = 331216585920.

The previous prime is 1021251141199. The next prime is 1021251141271. The reversal of 1021251141252 is 2521411521201.

1021251141252 is a `hidden beast` number, since 1 + 0 + 21 + 2 + 511 + 4 + 125 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 559767326976 + 461483814276 = 748176^2 + 679326^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×1021251141252² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 383351199 + ... + 383353862.

Almost surely, 2^{1021251141252} is an apocalyptic number.

1021251141252 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1021251141252 is an abundant number, since it is smaller than the sum of its proper divisors (1630014963144).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1021251141252 is a wasteful number, since it uses less digits than its factorization.

1021251141252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 766705108 (or 766705103 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 27.

Adding to 1021251141252 its reverse (2521411521201), we get a palindrome (3542662662453).

The spelling of 1021251141252 in words is "one trillion, twenty-one billion, two hundred fifty-one million, one hundred forty-one thousand, two hundred fifty-two".