20210222121011 has 4 divisors (see below), whose sum is σ = 21764854591872. Its totient is φ = 18655589650152.

The previous prime is 20210222120971. The next prime is 20210222121073. The reversal of 20210222121011 is 11012122201202.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 20210222121011 - 2¹⁰ = 20210222119987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20210222121091) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 777316235411 + ... + 777316235436.

It is an arithmetic number, because the mean of its divisors is an integer number (5441213647968).

Almost surely, 2^{20210222121011} is an apocalyptic number.

20210222121011 is a deficient number, since it is larger than the sum of its proper divisors (1554632470861).

20210222121011 is a wasteful number, since it uses less digits than its factorization.

20210222121011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1554632470860.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 20210222121011 its reverse (11012122201202), we get a palindrome (31222344322213).

The spelling of 20210222121011 in words is "twenty trillion, two hundred ten billion, two hundred twenty-two million, one hundred twenty-one thousand, eleven".