20010121202 has 4 divisors (see below), whose sum is σ = 30015181806. Its totient is φ = 10005060600.

The previous prime is 20010121199. The next prime is 20010121231. The reversal of 20010121202 is 20212101002.

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: 20212101002 = 2 ⋅10106050501.

It can be written as a sum of positive squares in only one way, i.e., 18379496041 + 1630625161 = 135571^2 + 40381^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5002530299 + ... + 5002530302.

Almost surely, 2^20010121202 is an apocalyptic number.

20010121202 is a deficient number, since it is larger than the sum of its proper divisors (10005060604).

20010121202 is a wasteful number, since it uses less digits than its factorization.

20010121202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10005060603.

The product of its (nonzero) digits is 16, while the sum is 11.

Adding to 20010121202 its reverse (20212101002), we get a palindrome (40222222204).

The spelling of 20010121202 in words is "twenty billion, ten million, one hundred twenty-one thousand, two hundred two".