200210122099978 has 4 divisors (see below), whose sum is σ = 300315183149970. Its totient is φ = 100105061049988.

The previous prime is 200210122099961. The next prime is 200210122099979. The reversal of 200210122099978 is 879990221012002.

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., 191721214473649 + 8488907626329 = 13846343^2 + 2913573^2 .

It is not an unprimeable number, because it can be changed into a prime (200210122099979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50052530524993 + ... + 50052530524996.

Almost surely, 2^{200210122099978} is an apocalyptic number.

200210122099978 is a deficient number, since it is larger than the sum of its proper divisors (100105061049992).

200210122099978 is a wasteful number, since it uses less digits than its factorization.

200210122099978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100105061049991.

The product of its (nonzero) digits is 653184, while the sum is 52.

The spelling of 200210122099978 in words is "two hundred trillion, two hundred ten billion, one hundred twenty-two million, ninety-nine thousand, nine hundred seventy-eight".