20401012211 has 2 divisors, whose sum is σ = 20401012212. Its totient is φ = 20401012210.

The previous prime is 20401012189. The next prime is 20401012267. The reversal of 20401012211 is 11221010402.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 20401012211 - 2²² = 20396817907 is a prime.

It is a super-2 number, since 2×20401012211² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20401012711) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10200506105 + 10200506106.

It is an arithmetic number, because the mean of its divisors is an integer number (10200506106).

Almost surely, 2^20401012211 is an apocalyptic number.

20401012211 is a deficient number, since it is larger than the sum of its proper divisors (1).

20401012211 is an equidigital number, since it uses as much as digits as its factorization.

20401012211 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 20401012211 its reverse (11221010402), we get a palindrome (31622022613).

The spelling of 20401012211 in words is "twenty billion, four hundred one million, twelve thousand, two hundred eleven".