100121311252 has 12 divisors (see below), whose sum is σ = 175714338100. Its totient is φ = 49917214656.

The previous prime is 100121311207. The next prime is 100121311253. The reversal of 100121311252 is 252113121001.

It can be written as a sum of positive squares in 2 ways, for example, as 53436794896 + 46684516356 = 231164^2 + 216066^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (100121311253) 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, 35858673 + ... + 35861464.

Almost surely, 2^100121311252 is an apocalyptic number.

It is an amenable number.

100121311252 is a deficient number, since it is larger than the sum of its proper divisors (75593026848).

100121311252 is a wasteful number, since it uses less digits than its factorization.

100121311252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71720490 (or 71720488 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 19.

Adding to 100121311252 its reverse (252113121001), we get a palindrome (352234432253).

The spelling of 100121311252 in words is "one hundred billion, one hundred twenty-one million, three hundred eleven thousand, two hundred fifty-two".