200101001001021 has 16 divisors (see below), whose sum is σ = 298159487689920. Its totient is φ = 132629565207600.

The previous prime is 200101001000933. The next prime is 200101001001037. The reversal of 200101001001021 is 120100100101002.

It is a happy number.

It is not a de Polignac number, because 200101001001021 - 2⁷ = 200101001000893 is a prime.

It is a super-2 number, since 2×200101001001021² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 200101001000994 and 200101001001012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200101001001721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21419498755 + ... + 21419508096.

It is an arithmetic number, because the mean of its divisors is an integer number (18634967980620).

Almost surely, 2^{200101001001021} is an apocalyptic number.

It is an amenable number.

200101001001021 is a deficient number, since it is larger than the sum of its proper divisors (98058486688899).

200101001001021 is a wasteful number, since it uses less digits than its factorization.

200101001001021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42839007033 (or 42839007027 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 200101001001021 its reverse (120100100101002), we get a palindrome (320201101102023).

The spelling of 200101001001021 in words is "two hundred trillion, one hundred one billion, one million, one thousand, twenty-one".