20121211210202 has 4 divisors (see below), whose sum is σ = 30181816815306. Its totient is φ = 10060605605100.

The previous prime is 20121211210187. The next prime is 20121211210223. The reversal of 20121211210202 is 20201211212102.

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

It can be written as a sum of positive squares in only one way, i.e., 18806888829481 + 1314322380721 = 4336691^2 + 1146439^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5030302802549 + ... + 5030302802552.

Almost surely, 2^{20121211210202} is an apocalyptic number.

20121211210202 is a deficient number, since it is larger than the sum of its proper divisors (10060605605104).

20121211210202 is a wasteful number, since it uses less digits than its factorization.

20121211210202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10060605605103.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 20121211210202 its reverse (20201211212102), we get a palindrome (40322422422304).

The spelling of 20121211210202 in words is "twenty trillion, one hundred twenty-one billion, two hundred eleven million, two hundred ten thousand, two hundred two".