21220101111946 has 32 divisors (see below), whose sum is σ = 35204358801600. Its totient is φ = 9512049156480.

The previous prime is 21220101111931. The next prime is 21220101111947. The reversal of 21220101111946 is 64911110102212.

It is not an unprimeable number, because it can be changed into a prime (21220101111947) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10695885 + ... + 12523663.

It is an arithmetic number, because the mean of its divisors is an integer number (1100136212550).

Almost surely, 2^{21220101111946} is an apocalyptic number.

21220101111946 is a deficient number, since it is larger than the sum of its proper divisors (13984257689654).

21220101111946 is a wasteful number, since it uses less digits than its factorization.

21220101111946 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1835094.

The product of its (nonzero) digits is 1728, while the sum is 31.

The spelling of 21220101111946 in words is "twenty-one trillion, two hundred twenty billion, one hundred one million, one hundred eleven thousand, nine hundred forty-six".