211216621135 has 16 divisors (see below), whose sum is σ = 279304701984. Its totient is φ = 152348015232.

The previous prime is 211216621093. The next prime is 211216621163. The reversal of 211216621135 is 531126612112.

It is a cyclic number.

It is not a de Polignac number, because 211216621135 - 2²³ = 211208232527 is a prime.

It is a super-2 number, since 2×211216621135² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 211216621097 and 211216621106.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37781932 + ... + 37787521.

It is an arithmetic number, because the mean of its divisors is an integer number (17456543874).

Almost surely, 2^211216621135 is an apocalyptic number.

211216621135 is a deficient number, since it is larger than the sum of its proper divisors (68088080849).

211216621135 is a wasteful number, since it uses less digits than its factorization.

211216621135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75569514.

The product of its digits is 4320, while the sum is 31.

The spelling of 211216621135 in words is "two hundred eleven billion, two hundred sixteen million, six hundred twenty-one thousand, one hundred thirty-five".