202121001011011 has 4 divisors (see below), whose sum is σ = 203596336784952. Its totient is φ = 200645665237072.

The previous prime is 202121001011003. The next prime is 202121001011029. The reversal of 202121001011011 is 110110100121202.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 202121001011011 - 2³ = 202121001011003 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 202121001010982 and 202121001011000.

It is not an unprimeable number, because it can be changed into a prime (202121001111011) 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, 737667886765 + ... + 737667887038.

It is an arithmetic number, because the mean of its divisors is an integer number (50899084196238).

Almost surely, 2^{202121001011011} is an apocalyptic number.

202121001011011 is a deficient number, since it is larger than the sum of its proper divisors (1475335773941).

202121001011011 is a wasteful number, since it uses less digits than its factorization.

202121001011011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1475335773940.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 202121001011011 its reverse (110110100121202), we get a palindrome (312231101132213).

The spelling of 202121001011011 in words is "two hundred two trillion, one hundred twenty-one billion, one million, eleven thousand, eleven".