21261021460262 has 16 divisors (see below), whose sum is σ = 31970490435072. Its totient is φ = 10604201779080.

The previous prime is 21261021460201. The next prime is 21261021460277. The reversal of 21261021460262 is 26206412016212.

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, 1454183 + ... + 6681069.

It is an arithmetic number, because the mean of its divisors is an integer number (1998155652192).

Almost surely, 2^{21261021460262} is an apocalyptic number.

21261021460262 is a deficient number, since it is larger than the sum of its proper divisors (10709468974810).

21261021460262 is a wasteful number, since it uses less digits than its factorization.

21261021460262 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5231923.

The product of its (nonzero) digits is 27648, while the sum is 35.

Adding to 21261021460262 its reverse (26206412016212), we get a palindrome (47467433476474).

The spelling of 21261021460262 in words is "twenty-one trillion, two hundred sixty-one billion, twenty-one million, four hundred sixty thousand, two hundred sixty-two".