10021211219978 has 16 divisors (see below), whose sum is σ = 17180100371904. Its totient is φ = 4294584524160.

The previous prime is 10021211219959. The next prime is 10021211219989. The reversal of 10021211219978 is 87991211212001.

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, 18074183 + ... + 18620378.

It is an arithmetic number, because the mean of its divisors is an integer number (1073756273244).

Almost surely, 2^{10021211219978} is an apocalyptic number.

10021211219978 is a deficient number, since it is larger than the sum of its proper divisors (7158889151926).

10021211219978 is a wasteful number, since it uses less digits than its factorization.

10021211219978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36714077.

The product of its (nonzero) digits is 36288, while the sum is 44.

The spelling of 10021211219978 in words is "ten trillion, twenty-one billion, two hundred eleven million, two hundred nineteen thousand, nine hundred seventy-eight".