21211524141052 has 24 divisors (see below), whose sum is σ = 42435678136320. Its totient is φ = 9087946806000.

The previous prime is 21211524141013. The next prime is 21211524141061. The reversal of 21211524141052 is 25014142511212.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112670824 + ... + 112858927.

It is an arithmetic number, because the mean of its divisors is an integer number (1768153255680).

Almost surely, 2^{21211524141052} is an apocalyptic number.

It is an amenable number.

21211524141052 is an abundant number, since it is smaller than the sum of its proper divisors (21224153995268).

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

21211524141052 is a wasteful number, since it uses less digits than its factorization.

21211524141052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225533121 (or 225533119 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 31.

Adding to 21211524141052 its reverse (25014142511212), we get a palindrome (46225666652264).

The spelling of 21211524141052 in words is "twenty-one trillion, two hundred eleven billion, five hundred twenty-four million, one hundred forty-one thousand, fifty-two".