202102022011 has 4 divisors (see below), whose sum is σ = 202103983224. Its totient is φ = 202100060800.

The previous prime is 202102021991. The next prime is 202102022021. The reversal of 202102022011 is 110220201202.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 110220201202 = 2 ⋅55110100601.

It is a cyclic number.

It is not a de Polignac number, because 202102022011 - 2¹⁹ = 202101497723 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202102021982 and 202102022000.

It is not an unprimeable number, because it can be changed into a prime (202102022021) 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, 816925 + ... + 1035166.

It is an arithmetic number, because the mean of its divisors is an integer number (50525995806).

Almost surely, 2^202102022011 is an apocalyptic number.

202102022011 is a deficient number, since it is larger than the sum of its proper divisors (1961213).

202102022011 is a wasteful number, since it uses less digits than its factorization.

202102022011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1961212.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 202102022011 its reverse (110220201202), we get a palindrome (312322223213).

The spelling of 202102022011 in words is "two hundred two billion, one hundred two million, twenty-two thousand, eleven".