20120221111211 has 8 divisors (see below), whose sum is σ = 21671825513520. Its totient is φ = 18569173149792.

The previous prime is 20120221111183. The next prime is 20120221111223. The reversal of 20120221111211 is 11211112202102.

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 20120221111211 - 2⁴² = 15722174600107 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 20120221111211.

It is not an unprimeable number, because it can be changed into a prime (20120221113211) 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, 139035116 + ... + 139179753.

It is an arithmetic number, because the mean of its divisors is an integer number (2708978189190).

Almost surely, 2^{20120221111211} is an apocalyptic number.

20120221111211 is a deficient number, since it is larger than the sum of its proper divisors (1551604402309).

20120221111211 is a wasteful number, since it uses less digits than its factorization.

20120221111211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278220445.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 20120221111211 its reverse (11211112202102), we get a palindrome (31331333313313).

The spelling of 20120221111211 in words is "twenty trillion, one hundred twenty billion, two hundred twenty-one million, one hundred eleven thousand, two hundred eleven".