121010100201 has 24 divisors (see below), whose sum is σ = 183169814240. Its totient is φ = 78956905896.

The previous prime is 121010100199. The next prime is 121010100223. The reversal of 121010100201 is 102001010121.

It is a happy number.

It is not a de Polignac number, because 121010100201 - 2¹ = 121010100199 is a prime.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121010100241) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 954811 + ... + 1074096.

Almost surely, 2^121010100201 is an apocalyptic number.

It is an amenable number.

121010100201 is a deficient number, since it is larger than the sum of its proper divisors (62159714039).

121010100201 is an equidigital number, since it uses as much as digits as its factorization.

121010100201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2029010 (or 2028957 counting only the distinct ones).

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

Adding to 121010100201 its reverse (102001010121), we get a palindrome (223011110322).

The spelling of 121010100201 in words is "one hundred twenty-one billion, ten million, one hundred thousand, two hundred one".