1202121100001 has 32 divisors (see below), whose sum is σ = 1290334631040. Its totient is φ = 1116627393024.

The previous prime is 1202121099997. The next prime is 1202121100013. The reversal of 1202121100001 is 1000011212021.

It is a cyclic number.

It is not a de Polignac number, because 1202121100001 - 2² = 1202121099997 is a prime.

It is a super-2 number, since 2×1202121100001² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1202121106001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 250805261 + ... + 250810053.

It is an arithmetic number, because the mean of its divisors is an integer number (40322957220).

Almost surely, 2^{1202121100001} is an apocalyptic number.

It is an amenable number.

1202121100001 is a deficient number, since it is larger than the sum of its proper divisors (88213531039).

1202121100001 is a wasteful number, since it uses less digits than its factorization.

1202121100001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6065.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 1202121100001 its reverse (1000011212021), we get a palindrome (2202132312022).

The spelling of 1202121100001 in words is "one trillion, two hundred two billion, one hundred twenty-one million, one hundred thousand, one".