21475502212 has 24 divisors (see below), whose sum is σ = 40718262816. Its totient is φ = 9871091328.

The previous prime is 21475502207. The next prime is 21475502231. The reversal of 21475502212 is 21220557412.

It is a happy number.

It is a super-2 number, since 2×21475502212² (a number of 21 digits) contains 22 as substring.

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, 3669358 + ... + 3675205.

It is an arithmetic number, because the mean of its divisors is an integer number (1696594284).

Almost surely, 2^21475502212 is an apocalyptic number.

It is an amenable number.

21475502212 is a deficient number, since it is larger than the sum of its proper divisors (19242760604).

21475502212 is a wasteful number, since it uses less digits than its factorization.

21475502212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7344627 (or 7344625 counting only the distinct ones).

The product of its (nonzero) digits is 11200, while the sum is 31.

The spelling of 21475502212 in words is "twenty-one billion, four hundred seventy-five million, five hundred two thousand, two hundred twelve".