211220010110021 has 8 divisors (see below), whose sum is σ = 230444272290144. Its totient is φ = 191999488443120.

The previous prime is 211220010110017. The next prime is 211220010110023. The reversal of 211220010110021 is 120011010022112.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 211220010110021 - 2² = 211220010110017 is a prime.

It is a super-2 number, since 2×211220010110021² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 211220010109978 and 211220010110005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211220010110023) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 935010230 + ... + 935236103.

It is an arithmetic number, because the mean of its divisors is an integer number (28805534036268).

Almost surely, 2^{211220010110021} is an apocalyptic number.

It is an amenable number.

211220010110021 is a deficient number, since it is larger than the sum of its proper divisors (19224262180123).

211220010110021 is a wasteful number, since it uses less digits than its factorization.

211220010110021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1870256611.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 211220010110021 its reverse (120011010022112), we get a palindrome (331231020132133).

It can be divided in two parts, 2112200 and 10110021, that added together give a palindrome (12222221).

The spelling of 211220010110021 in words is "two hundred eleven trillion, two hundred twenty billion, ten million, one hundred ten thousand, twenty-one".